Continuous-wire-drawing machine.



C. A. BARRON.

CONTINUOUS W|RE DRAWING MAcHlNE.

APPLICATION FILED SEPT. I4'. 1918.

Patented Sept. 23

OFFICE CHARLESYA BARBON, OE WOODLEY, NEAR STOCKPOBT, ENGLAND.

coNTnvUoUs-'wInE-.Dmwme MACHINE.

Specification of Letters Patent. Ylaatllted Sept, 23,V `1919 Appucatmn mea september 14, 191s. serial No. 254,079.

To all whom it may concern Be it known that I, CHARLES ARNOLD BARRON, a subject of King George V of Great Britain, residing at Woodley, near Stockport, in the county of Cheshire, England, have invented'a new and useful Imrovement in Continuous -Wire Drawing achine's, of which the following is a speci- Y ication.

This invention relates to wire drawing machines in whiclr'the wire passes in succession through a series of dies and around respective drawdrumsto elongate or draw itv to the degree 'of fineness desired, and the object of my improvements is to provide simple and effective means lfor controlling the speeds of the winding drums according tothe diameter of the finishing block uponv which the drawn wire is finally wound and means applied in conJunction with each drawing head for controlling the speed of the respective draw drum according to the elongation of the wire bein wound thereon,

such improved means, while applicable to machnes for drawing various thicknesses of wire, being especially advantageous in the drawing of very fine wire.

The object and nature of the invention thus set forth will, appear more fully from the accompanying description and drawing and will be particularly pointed out in the claims.

Figure 1 is an end elevation, looking in the direction of arrow A (Fig. 2) of a wire drawing machine embodying my improvements and showing more particularly the application of such improvements to the winding drum or blocks at the finishing end of the machine, the cross shaft for the near draw drums being broken away;

Fig. 2 is an elevation of a portion of one Aside of the machine showing more particularl the application of my improvements to t eindividual draw drums, and

Fig. 3 is a transverse section taken on line B, C of Fig. 2.

Referring to the drawings, and firstly to Fig. 1, letter a represents the usual finishing blocks u on which the drawn wire is finally woun there being one block for receiving the wire drawn by the series of draw drums on each longitudinal side of the machine. If only one side of the machine is lifted with draw drums, one finishing block only is employed. The said blocks a are mounted on vertical spindles b supported in bearings cubolted or forming a part of the framework d of the machine.

According to the'invention, rotary motion is transmitted to each block a through bevel pinion e and bevel wheel e from a counter shaft f having mounted thereon two differential motions, one for each block a, each differential motion comprising a driven toothed or sprocket wheel g loosely mounted on a sleeve h which is in turn loosely mounted upon the counter shaft f. The said sleeve h has fast on one end thereof -a grooved brake or like pulley z' and on its opposite end a toothed wheel j which meshes w1th planet pinions c mounted loosely on studs Zsecured to the driven toothed Wheel g. Each toothed wheel g is positively driven in this instance by chain m from sprocket wheels n fast on a shaft o receiving motion from the main shaft of the machine.

The planet pinions c, of which there may be three or other desired number, mesh with an internal toothed ring p concentric with the toothed'wheel j and secured by screws or like means to or formed integral with a disk q the boss of-which is mounted on and keyed or otherwise secured to the boss of the bevel inion e.

Normally the parts comprising each differential revolve as one piece, the internal toothed ring p thereof being carried around at the same speed as the toothed wheel g by s ring pressed pawls or fingers such as r (Isee Fig. 2) pivotally mounted on studs secured to the driven toothed wheel g, this being a common feature in differential motions and, per se, forming no part of my invention.

By applying pressure to the brake drum or pulley of each or either of the differentials as by a strap, or as in the instance illustrated, by the end of a screwed spindle s working through a nut s in a cross girt, Vthe speed of rotation of the toothed gear 7' can be retarded to .any desired extent according to the adjustment of the screwed spindle a,l and such retardation of the speed of gear j, through the action of the planet pinions k causes the toothed ring p and the disk q secured thereto to be driven at a correspondingly accelerated speed. The degree of acceleration is determined by the diameter of the finishing block a employed and is adjusted before the starting of the machine, such means of varying the speed of rotation of the finishing blocks enabling varying affecting the operation of themachine, the

speed at which each finishing block is driven controlling the speed of each individual drawing drumv in the machine.

Referring now more particularly to Figs. 2 and. 3, I provide in conjunction with means for determining the speed of 'rotation of the finishing block for a series of drawin'g drums, means comprising similar diderential motions for self-actingly adjusting or controlling the speed of each individual drawing drum in the several drawing heads according to variations from the normal in the elongation of the wire.

The parts comprising the differential combined with each draw drum t, or drawing head, of which there may 'be anyl suitable number arranged at suitable distances apart side by side longitudinally on both sides of the machine, bear the same'letters of reference as the corresponding parts of the differentials already described with reference to ythe finishing blocks a, but in this instance, the toothed wheels g are conveniently geared together by. intermediate or carrier pinions u and motion is transmitted to same Yin any appropriate manner from the main shaft of the machine. The disks y carrying the internal toothed rings p are 1n this instance secured to or formed integralwith the draw drums t. Withthe exceptions noted, the description previously given of the differentials for the finishing blocks applies also to the'diderentials for each draw drum and need not therefore be again set forth.

In a suitable position adjacent to and preferably below each brake or grooved Ipulley z' secured to the sleeves h carrying the individual differentials, is pivoted on a stud v secured to the framing of the machine, or to a bracket, a two armed lever w suitably weighted at one end fw and carrying at the opposite' end a grooved pulley 102. Two separate arms pivoted on the said stud lv could be employed in lieu of a single double armed lever.

The wire m is fed through to the'die y in the die block y preceding each draw drum in the usual manner and after leaving the die is passed around the respective draw drum t but instead of being coiled around said drum in the ordinary manner it is passed intermediately around the grooved pulley 'L02 on the respective weighted lever lw and then passes again around the draw drum on its way to the next succeeding die, the procedure /being continued in respect of each following drawv drum until the wire is finally Wound upon the finishing block a, vveach succeeding drawing operation between the die and next draw drum reducing-the diameter ofthe wire until the desired reduction is obtained at the last drawing head.

Each lever fw has connected at a suitable point thereto, one y,end of a brake strap z which extends around the brake drum or pulley z' and is secured at its opposite end in any-suitable manner to a fixed part such as a boss or collar on the stud 'u or on the lever lw.

If the elongation of thev wire at each drawing head is normal, leach dierential and its wlnding or draw drum t rotate as one piece at the normal speed, "but immediately theelongation ofthe wire at any one or more drawing head becomes abnormal-that is to say, the wire is not being y-fed to the draw drum at the same rate of speed as the surface speed of said drum, the pull of the wire passing around the grooved pulley wz vcaused by its reduced rate of feed through the die y to the drum, rocks the lever fw to a corresponding extent whereby the brake strap a is drawn more or less tightly around the brake pulley i and the speed of the draw drum t through the action of the differential in the manner above described with reference to the finishing blocks a, is accelerated, such acceleration of motion continuing until the elongation of the wire becomes normal again 'when the brake strap is slackened by the movement of the lever 'w to itsoriginal position under the action of the Jbalance weight fw and the draw drum is again caused to revolve at the same speed as the driven toothed Having thusdescribed my invention, what I I claim as new and desire to secure by Let- 1. In a wire drawing` machine, a revoluble finishing block, a differential driving mechanism operatively connected with the said finishing block, means for driving one member of the dierential mechanism positively a brake connected with another member of the differential mechanism, and means for adjusting the action of the brake so as to vary the speed of the finishing block through the instrumentality of the said differential mechanism.

2. In a wire drawing machine, a driving shaft for a finishing block, afinishing block for receiving ,the fully drawn wire mounted removably on the saidshaft so that finishing blocks of different size can be substituted for it, a driving wheel operatively connected with the said shaft, a ositivelydriven driving wheel,` a differential gearing interposed between the two said drivlng wheels, a brake wheel operatively connected with one member of the dill'e'rential gearing, and a manually adjustable devicel for ap lying pressure to the said brake wheel an thereby accelerating the Speed of the drivin shaft and nishing block to suit the size o the finishing block.

3.' In a wire drawing machine, a vertical driving shaft for a nishin block, av finishing block for receiving the ully drawn Wire mounted removably on the said shaft, a horizontal driving shaft, bevel toothed wheels operatively connecting the two said shafts, a positively driven driving wheel mounted concentric with the said horizontal shaft, a differential gearing interposed between the said driving wheel and one of the beveled toothed wheels, a brake wheel operatively connected with one member of the differential gearing,

'and means for applying pressure to the brake Wheel to accelerate the speed of the finishing block.

4. In a wire drawing machine, a revoluble draw drum, a die block preceding the said draw drum, a positively driven driving wheel journaled concentric with the draw drum, a differential mechanism interposed between the said driving wheel and draw drum, a brake Wheel operatively connected with one member-fof the differential mechanism, a pivoted lever provided with means for retarding the motion of the brake wheel, and a roller carried by the said lever and adapted t0 have the wire looped over it in its passage around the said draw drum, whereby the speed of the said draw drum is controlled by the action of the said preceding die'block on the wire.

In testimony whereof I affix my signature in the 1presence of two witnesses.

CHARLES A. BARRON. 

